/var/cache/apt/archives/
       Storage area for retrieved package files.
       Configuration Item: Dir::Cache::Archives.

   /var/cache/apt/archives/partial/
       Storage area for package files in transit.
       Configuration Item: Dir::Cache::Archives
       (partial will be implicitly appended)

   /var/lib/apt/lists/
       Storage area for state information for each package resource specified in
       sources.list(5)
       Configuration Item: Dir::State::Lists.